Uitvinder Goro Ibuki creëert een mensachtige robot genaamd Jet Jaguar. Het wordt al snel in beslag genomen door een onderzees ras van mensen genaamd de Seatopians. Met Jet Jaguar als gids sturen de Seatopians Megalon als wraak voor de kernproeven die hun samenleving hebben verwoest.
Nee, helaas is ゴジラ対メガロ nog niet beschikbaar op Netflix in Nederland.
| Camera | 逢沢譲 | Director of Photography |
| Directing | 福田純 | Director |
| Editing | 池田美千子 | Editor |
| Production | 田中友幸 | Producer |
| Sound | 眞鍋理一郎 | Original Music Composer |
| Art | Yoshifumi Honda | Production Design |
| Writing | 福田純 | Screenplay |
| Sound | Masato Shimon | Vocals |
| Sound | Eishiro Hayashi | Sound Recordist |
| Lighting | Masakuni Morimoto | Lighting Technician |
| Crew | 青木 利郎 | Visual Effects Art Director |
| Writing | 関沢新一 | Lyricist |
| Production | Keisuke Shinodo | Production Manager |
| Visual Effects | Takeshi Miyanishi | Visual Effects |
| Visual Effects | Kazunobu Sanpei | Visual Effects Compositor |
| Crew | 中野昭慶 | Special Effects |
| Crew | Shoji Ogawa | Special Effects |
| Visual Effects | 中野昭慶 | Visual Effects Director |
| Writing | 関沢新一 | Story |
| Writing | 木村 武 | Original Story |
| Directing | 西川 常三郎 | First Assistant Director |
| Directing | Eiichi Asada | Assistant Director |
| Crew | Tadaaki Watanabe | Special Effects |
| Costume & Make-Up | 安丸信行 | Costume Design |
| Visual Effects | 安丸信行 | Modeling |
| Costume & Make-Up | 小林知己 | Assistant Costume Designer |
| Costume & Make-Up | 小林知己 | Costume Design |
| Visual Effects | 小林知己 | Modeling |
| Visual Effects | 富岡 素敬 | VFX Director of Photography |
| Crew | 富岡 素敬 | Special Effects |
| Visual Effects | Kazunobu Sanpei | Visual Effects |
| Visual Effects | 中野昭慶 | Visual Effects |
| Production | Shizuo Nakajima | Production Assistant |
| Directing | Yoshio Tabuchi | Assistant Director |
